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This AP Computer Science A study guide covers string manipulation in Java, including using external libraries and APIs. It explores the String class and its methods like length(), substring(), equals(), and compareTo(). It also provides practice problems and examples for indexOf(). The guide references the AP CS A Java Quick Reference Sheet and includes multiple choice and free response practice questions.
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Question 1 of 12
What is the primary purpose of external libraries and APIs in Java? 🤔
To make the code harder to understand
To provide pre-written code for common tasks
To slow down the execution of code
To replace the need for Java documentation